1 /*
2  * Copyright (C) 2010 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.launcher2;
18 
19 import android.content.Context;
20 import android.graphics.Bitmap;
21 import android.util.AttributeSet;
22 import android.widget.TextView;
23 
24 /**
25  * An icon on a PagedView, specifically for items in the launcher's paged view (with compound
26  * drawables on the top).
27  */
28 public class PagedViewIcon extends TextView {
29     /** A simple callback interface to allow a PagedViewIcon to notify when it has been pressed */
30     public static interface PressedCallback {
iconPressed(PagedViewIcon icon)31         void iconPressed(PagedViewIcon icon);
32     }
33 
34     @SuppressWarnings("unused")
35     private static final String TAG = "PagedViewIcon";
36     private static final float PRESS_ALPHA = 0.4f;
37 
38     private PagedViewIcon.PressedCallback mPressedCallback;
39     private boolean mLockDrawableState = false;
40 
41     private Bitmap mIcon;
42 
PagedViewIcon(Context context)43     public PagedViewIcon(Context context) {
44         this(context, null);
45     }
46 
PagedViewIcon(Context context, AttributeSet attrs)47     public PagedViewIcon(Context context, AttributeSet attrs) {
48         this(context, attrs, 0);
49     }
50 
PagedViewIcon(Context context, AttributeSet attrs, int defStyle)51     public PagedViewIcon(Context context, AttributeSet attrs, int defStyle) {
52         super(context, attrs, defStyle);
53     }
54 
applyFromApplicationInfo(ApplicationInfo info, boolean scaleUp, PagedViewIcon.PressedCallback cb)55     public void applyFromApplicationInfo(ApplicationInfo info, boolean scaleUp,
56             PagedViewIcon.PressedCallback cb) {
57         mIcon = info.iconBitmap;
58         mPressedCallback = cb;
59         setCompoundDrawablesWithIntrinsicBounds(null, new FastBitmapDrawable(mIcon), null, null);
60         setText(info.title);
61         if (info.contentDescription != null) {
62             setContentDescription(info.contentDescription);
63         }
64         setTag(info);
65     }
66 
lockDrawableState()67     public void lockDrawableState() {
68         mLockDrawableState = true;
69     }
70 
resetDrawableState()71     public void resetDrawableState() {
72         mLockDrawableState = false;
73         post(new Runnable() {
74             @Override
75             public void run() {
76                 refreshDrawableState();
77             }
78         });
79     }
80 
drawableStateChanged()81     protected void drawableStateChanged() {
82         super.drawableStateChanged();
83 
84         // We keep in the pressed state until resetDrawableState() is called to reset the press
85         // feedback
86         if (isPressed()) {
87             setAlpha(PRESS_ALPHA);
88             if (mPressedCallback != null) {
89                 mPressedCallback.iconPressed(this);
90             }
91         } else if (!mLockDrawableState) {
92             setAlpha(1f);
93         }
94     }
95 }
96